Question

Why is water's surface tension so high?

Answer 1

Surface tension:

1. Surface tension is a property of a liquid's surface.
2. Because of the cohesive structure of its molecules, surface tension allows it to resist an external force.

Water:

1. The comparatively high molecular or strong cohesive connections that occur between its molecules give water, among other liquids, a high surface tension.
2. Furthermore, hydrogen bonding allows water molecules to strongly stick together and resist stretching.
3. At $20°\mathrm{C},$ it has a surface tension of about $72.8\mathrm{mN}$per meter.